﻿using System;
using System.IO;
using System.Data;
using System.Text;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.Collections.Generic;
using System.Windows.Forms;
using Microsoft.Reporting.WinForms;
using BL.Entity;

namespace LTO
{
    public class Demo : IDisposable
    {
        string GetDefaultPrinter()
        {
            PrinterSettings settings = new PrinterSettings();
            foreach (string printer in PrinterSettings.InstalledPrinters)
            {
                settings.PrinterName = printer;
                if (settings.IsDefaultPrinter)
                    return printer;
            }
            return string.Empty;
        }
        private int m_currentPageIndex;
        private IList<Stream> m_streams;
        List<ReportNumDTO> numberResultShow;
        public Demo(List<ReportNumDTO> numberResult)
        {
            numberResultShow = new List<ReportNumDTO>();
            numberResultShow = numberResult;
        }
        private Stream CreateStream(string name,
      string fileNameExtension, Encoding encoding,
      string mimeType, bool willSeek)
        {
            Stream stream = new FileStream(@"..\..\" + name +
               "." + fileNameExtension, FileMode.Create);
            m_streams.Add(stream);
            return stream;
        }
        // Export the given report as an EMF (Enhanced Metafile) file.
        private void Export(LocalReport report)
        {
            string deviceInfo =
              "<DeviceInfo>" +
              "  <OutputFormat>EMF</OutputFormat>" +
              "  <PageWidth>8.5in</PageWidth>" +
              "  <PageHeight>11in</PageHeight>" +
              "  <MarginTop>0.25in</MarginTop>" +
              "  <MarginLeft>0.25in</MarginLeft>" +
              "  <MarginRight>0.25in</MarginRight>" +
              "  <MarginBottom>0.25in</MarginBottom>" +
              "</DeviceInfo>";
            Warning[] warnings;
            m_streams = new List<Stream>();
            report.Render("Image", deviceInfo, CreateStream,
               out warnings);
            foreach (Stream stream in m_streams)
                stream.Position = 0;
        }
        // Handler for PrintPageEvents
        private void PrintPage(object sender, PrintPageEventArgs ev)
        {
            Metafile pageImage = new
               Metafile(m_streams[m_currentPageIndex]);
            ev.Graphics.DrawImage(pageImage, ev.PageBounds);
            m_currentPageIndex++;
            ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
        }
        private void Print()
        {
            string printerName = GetDefaultPrinter();
            if (m_streams == null || m_streams.Count == 0)
                return;
            PrintDocument printDoc = new PrintDocument();
            printDoc.PrinterSettings.PrinterName = printerName;
            if (!printDoc.PrinterSettings.IsValid)
            {
                string msg = String.Format(
                   "Can't find printer \"{0}\".", printerName);
                MessageBox.Show(msg, "Print Error");
                return;
            }
            printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
            printDoc.Print();
        }
        // Create a local report for Report.rdlc, load the data,
        //    export the report to an .emf file, and print it.
        public void Run()
        {
            LocalReport report = new LocalReport();
            report.ReportPath = System.Configuration.ConfigurationManager.AppSettings["ReportPath"];
            report.DataSources.Add(
               new ReportDataSource("DataSet1", numberResultShow));
            Export(report);
            m_currentPageIndex = 0;
            Print();
        }

        public void Dispose()
        {
            if (m_streams != null)
            {
                foreach (Stream stream in m_streams)
                    stream.Close();
                m_streams = null;
            }
        }

    }
}
